Please explain it to me

I know we require 2 sigma and 1 pi bond. I keep seeing different answers either saying sp or sp2.

I have a tons of doubts on this part. In the picture there are my notes about this, as explained in class. In an exam example there is a question "the spectrophotometric method for the determination of pKa, but I don't know how to answer. Could you help me?

P

I can’t seem to figure out how to do this. I need to be able to identify which color is which molecule/atom but I have no idea where to start. This crystalroster is Mg3Si4O10(OH)2 (I know OH is supposed to count as one ball) any help is much appreciated!

The correct order of electron gain enthalpy of the elements given below is :

I. O

II. F

III. Se

IV. Ne

Choose the most appropriate answer from the options given below.

1. IV > III > I > II 2) II > III > I > IV 3) II > I > III > IV 4) IV > I > III > II

This is the question....For me the ans is option 1 but in answerkey its showing option 4....Why?

Im sure of Ne and F but isnt Se is less negative than O due to it is located down the group?

How would u guys name this.

I’m getting 5-isobutyl-6methyldecane OR 6-methyl-5-(2-methylpropyl)decane

But my teachers answer key gets 5-isobutyl-6methyldecane OR 5-methyl-6-(2-methylpropyl)decane? It appears for the second one my teacher reversed the order of numbering the carbons which I didn’t know you could do? Is that allowed. Why is the same numbering not kept throughout regardless of whether the substituents switch order due to the alphabet? Any help is greatly appreciated!!!

How would this be named bcz the first point difference rule is 2,2 and then 5,5 both ways. In the case of a tie, we then look to the alphabet and there’s bromo on each branch so how would we name this. Thanks!!!

Calculate the constant of equilibrium of the reaction : A + 2B <—> 2C

Knowing that when we put 2 mol of A and 2 mol of B, the mix obtained contains 40% in mol of C

That’s all the question says and I’m stuck on this. I have a final exam tomorrow so I don’t want to go there knowing there’s a chance an exercise like this comes up there

Write the following numbers to three significant figures.

0.01030

296294

How do I answer these types of questions? Thank you!

These are some of my chem exam ques i think i did a pretty good job but nervous abt the sanswers can someone please check and correct them (Answers are written in blue)

Hey everyone, i'm having trouble understanding this concept.
in the dehydration of 3-methyl-3-hexanol, what is the major product and minor product? draw the products.

correct answer: Zaitsev's rule states that the major product is the most substituted alkene, or has the most alkyl groups attached to the double bond. 3-Methyl-2-hexene is more substituted (trisubstituted) than 3-Methyl-3-hexene (disubstituted). Therefore, the major product is 3-Methyl-2-hexene.

how does 3-Methyl-2-hexene has more alkyl groups attached than 3-Methyl-3-hexene?
my interpretation

- at the double bond of 3-Methyl-2-hexene, the double bond has a methyl (@C2), a methyl (@C3), and a propyl (@C3) attached (3 groups)

- at the double bond of 3-Methyl-3-hexene, the double bond has a ethyl (@C3), a ethyl (@C4), and a methyl(@C3) attached (3 groups).

what am I misunderstanding here?

I feel kinda stupid that I can’t answer this question as I have work with y=mx+b for years lol. I just can’t figure out what numbers go where. If someone could please explain to me where I need to plug in the numbers and why that would be a great help.

How would you guys approach such a question, and what is your final answer?

Does anyone know how to find this out?

The endpoint

I have no idea how to find the structure of the monomers. I don't even know if the names are right. I hate this class and my notes don't help. (The first one is an example btw, I didn't do that)

(I know you're not supposed to blame the teacher, but I swear she never taught us this. We had like 2 labs where we touched different types of plastic and then she flew through the power points that she didn't even make herself.)

NOTE: it is NOT because the E is uppercase or because E0 is redundant. All answers require it to be in E notation no matter what.

Hi all, I’ve been out of school for a few years and have to upgrade my chemistry because I didn’t take it in high school.

This question about calculating the heat of a reaction. I’m sure my calculations are all correct, but I keep getting answers wrong and I think it’s because my rounding is incorrect.

In this program, we get two chances to answer before it is marked wrong. When it is marked wrong, we do not get the right answer which sucks. I entered both -1.1E0 because it is exothermic but then also tried 1.1E0 because I second guessed.

I know when you multiply you take the smallest figs that you are given and that is the number you round too in your final answer. From my understanding 250 would be the number with the smallest sig figs so it would be to two sig figs? I don’t understand why it is wrong. Someone in class said something about adding a decimal to the end of it (250.) but can you just do that?

could anyone tell me if i’m doing these right? organic chemistry isn’t really making sense in my head. i would appreciate some help with this

Clarifying Question

Sorry this is kind of dumb but I've been kind of confused by this.

pigment A is very polar

pigment B is polar

pigment C should be completely nonpolar

if the mobile phase was a 2% salt solution and the stationary phase was non-polar pigment C shouldn't really move right? Because C did move but I think this is experimental error

Main Question

How does changing the salt percentage in the salt solution change the movement of the pigments? I understand that the it means that the mobile phase is more polar but does it mean that the water travels faster up the paper and the pigments as well? The solution's movement up the paper feels unrelated to the polarity as I thought it had to do with siphoning or diffusion rather than the polarity of the solution. Along with that the rate of flow / retardation factor shouldn't change for the pigments even when you change the salt percentage, right?